obtuse [əbˈtju:s]

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adj.钝的；愚钝的

(of an angle ) more than 90° and less than 180 °

You were too obtuse to take the hint. 你太迟钝了，没有理解这种暗示。
"Sometimes it looks more like an obtuse triangle, " Winter said.“有时候它看起来更像一个钝角三角形。”温特说。